1
to polish;to shine;to burnish;to scour;to scrub;to brush (teeth);to grind (e.g. a lens)
弟は銀の食器類を磨いた。
My brother polished the silver.
2
to refine (a skill, etc.);to improve;to hone;to polish (up);to cultivate (one's character)
学生は読書の技能を磨くべきだ。
Students should develop their reading skills.
Other forms
研く 【みがく】 (rarely used kanji form) · 琢く 【みがく】 (rarely used kanji form)